SOLUTION: find two numbers that multiply to give -8 and add to give -2

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Question 1207777: find two numbers that multiply to give -8 and add to give -2
Found 2 solutions by mccravyedwin, math_tutor2020:
Answer by mccravyedwin(407)   (Show Source): You can put this solution on YOUR website!



Solve one of the equations for either x or y.  Then substitute
what you get in the other equation.  You will get a quadratic 
equation that will factor.  It will have two solutions, although
the x-value of one will be the y-value of the other.  Find the
other value by substituting.

Edwin
Answer by math_tutor2020(3817)   (Show Source): You can put this solution on YOUR website!

If we focus on integers only, then here are all of the ways to multiply to -8
1*(-8) = -8
2*(-4) = -8
4*(-2) = -8
8*(-1) = -8

Add up each pair
1 + (-8) = -7
2 + (-4) = -2
4 + (-2) = 2
8 + (-1) = 7

Answer: The numbers are 2 and -4
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